Inflating-coupling



pmreos'rares rA'rsnr OFFICE.

HENRY 1. KRAFT, OF BIDGEWOOD, NEW JERSEY.

INFLATING-COUPLING.

Application filed. June 25,

To all whom may concern:

Be it known that I, HENRY P. KRAFT, a

' citizen of the United States of America, re-

siding in Ridgewood, in the county of Bergen and State of New Jersey,have invented .certain new and useful llmprovements inlnfiating-Couplings, of which the following is a specification.

This invention relates to inflating couplings and aims to providecertain improvements therein. i

The invention is particularly designed as an improvement on theinflating coupling shown in the ap lication of Schweinert and 0.155,780. Tn such application a bell-shaped or cone-shaped washer isprovided which is adapted to fit over the nipple of the tire valve tomake a tight joint between the coupling and the valve; the constructionof this washer is, by the present invention, greatly improved andrendered more durable.

Referring to the drawings which illustrate one embodiment of theinvention,-

Figure l is a diametrical section of my improved inflating coupling,shown as applied to a tire valve.

Fig. 2 is a similar section of Q coupling with the valve removed.

Fig. 3 is a section on the line 3-3 in Fig. 2.

Referring to the drawings, let ,A indicate the coupling as a whole,which is shown as comprising a cylindrical casing B and an angledconnection C adapted to be connected to the pipe-line supplying air"under pressure. The casing B is formed with a valve chamber D withinwhich works a check-valve E which is adapted to co-act with a-seat Fformed upon a seat member Gr. The seat member preferably screws into thecylinder, a tight joint between the two being formed by a packing H. Thevalve E is normally held against the seat F by pressure within thepipe-line so that no air can escape. To open the valve when the couplingis applied toa tire valve, a valveopener l is provided. The latter has avalve-opening element J extending up through the seat F and contactingwith an abutment K whereby the valve is lifted.

The valve-opener is formed with a shoulder L which is adapted to engagethe valve shoulder M, as shown in Fig. 1, so that by pressing down onthe cougling, the valveopener lifts the valve E. elow the shoul-Speclflcation of Letters Patent.

the inflating tion.

Patented Dec. 21, 1920.

1917. Serial No. 176,814.

der L is arranged an abutment O which is of sufiiciently small diameterto enter the valve nipple and which is adapted to engage the tire valvepin P with the result that the tire valve check Q is forced from itsseat R, thus opening the tire valve to the incoming passage of air.These features are described in the aforesaid application and form apart of the'present invention.

The present invention particularly relates to the bell or cone-shapedwasher T which is constructed of rubber and which is held in aseat-member by a flange T which is clamped against the seat member by ascrewthreaded collar U so as to make a tight joint between the edges ofthe washerv T and the seat-member.

According to the present invention I provide the washer T with astiffening collar T which preferably placed on the inner side of thewasher T and extends part way u the same. The diameter of the collar issuc that it easily admits the valve nipple, and beyond the collar therubber of the washer T admits the nipple without too tight a fit.Preferably the collar T is formed in one piece with a metal washer T,which latter serves to stiden the flange T and also constitutes ananti-friction member by means of which the screwthreaded collar U maforce the washer to its seat without distorting the flange T".

T have found by the above invention that a tight joint can be madebetween the valve nipple and the coupling with very little pressure andthat this joint may be made a large number of times without destroyingor impairin the utility of the washer.

While I ave shown and described one form of the invention, it will beunderstood that I do not wish to be limited thereto, since variouschanges may be made therein without departing from the spirit of theinven- Nhile l have illustrated the invention in connection with anautomatic inflating coupling, it will be understood that it, isapplicable to any other construction in which it is desired to make atight jointwith a valve nipple or analogous part.

What I claim is 1. In a coupling having a casin adapted to receivewithin it an externa y screwthreaded tire valve nipple or the like, andforming'a chamber receiving air pressure when coupled, acupsha'pl dpacking adapted to make a close joint wit the end portion of at v . suchnipple, projecting into such chamber and receiving when-coupled externalair adapted to pressure tending to cdntr'act it on said nipple, and astiffening shell for said packing I revent the-contraction of thepacking against the nipple except at its ,end portion, whereby theabrasion of the packing by the external threadson the nipple is valve,and a valve-opening member extendlargel avoided.

2. n a coupling having an internal :check valve, and a valve-openingmember extending thence to the coupling opening, said coupling having achamber adapted to receive within it an externally screw-threaded tirevalve nipple or the like, a cup-shaped packing projecting into saidchamber adapted to make a close joint with the end portion of suchnipple, and'receiving when coupled external air pressure within saidchamber and a stiffening shell for said packing adapted to prevent thecontraction of the packing against the nipple except at its end portion.

3. In a coupling, adapted to receive within it an externallyscrew-threaded tire valve nipple or the like, a cup-shaped packingadapted to make a close joint with the end portion ofsuch nipple, and astifl'ening shell a threaded portion of such nipple, adapted to receivesuch threaded portion to prevent theYcontraction ,of the packing againstthe nippleexcept at its end portion, whereby the abrasion of the packingby the threaded portion is largely avoided.

4. In a coupling having an internal checking thence to the couplingopening, said coupling adapted to receive within it an externally screwsthreaded tire valve nipple or the like,"'a cup-shaped packing adaptedto make a close joint with the end portion of such nipple, the couplinghaving a chamber around said packing to which compressed air is admittedwhen said valve is opened, whereby to press the packing against suchnipple, and a stifi'ening shell within the packing where it would engagea threaded portion of such nipple, adapted to receive.

such threaded portion to prevent the contraction of the packing againstthe nipple except at its end portion.

In witness whereof, I have hereunto signed my name.

HENRY P. KRAFT.

